Frankie Dettori is likely to learn on Tuesday whether he will be able to ride in Saturday's Derby when he attends a medical committee hearing at the offices of France Galop.

The ruling body of French racing has yet to pass him fit to resume his career, a full week after the end of his six-month ban for a positive test for cocaine.

Magician, the winner of last Saturday's Irish 2,000 Guineas, could yet attempt a sensational double, having been left in the Derby at the latest entry stage on Monday.

No horse has won both races since Grundy in 1975. Magician is one of six possibles from the Aidan O'Brien yard, the Irish trainer having taken out Nevis. The colt is 13-2 third-favourite behind Jim Bolger's Dawn Approach on even-money and another O'Brien runner in Battle Of Marengo, an 11-2 shot.

Chopin was supplemented at a cost of £75,000 and is poised to become the first German-trained runner in the Epsom Classic.

Just three British-based horses remain in the field and only the 16-1 shot Libertarian is priced below 100-1.